Top roll for textile drawing mechanisms



May 18, 1954 R. K. BUTLER TOP ROLL FOR TEXTILE DRAWING MECHANISMS Filed Aug. 19, 1948 Patented May 18, 1954 j MECHANISMS I Richard K. Butler, Whitman, Mass., assignor, by

mesne assignments, to Textile Engineering Corporation, .Whitman, Masa a; corporation of Massachusetts Application August 19, 1948, Serial No. 45,045 i 1 Claim. (01. 19-142) dra ingfmechanisms usually comprise a castelevation.

ATENT. OFFICE...

-'call ed"solid top rollsf used in textile shown in Fig. 1 Wit some parts illustrated' in iron go f steel body provided with two enlarge- In the construction shown the roll body cons.

njie ts o .iosses-connectedbya reducedor neck sists of a shaft 2, usually made of st and two tniiyalsowith-jcurntls or gudgeons prometalbosses 8; 3 pressed on to it and spaced g rom theouter-ends of the bosses. When apart by the customary distance. Preferably the peripheral surfaces of these bosses are knurled hich maybe made of leather, synthetics,

or roughened, as indicated at a in Fig. 2, in order;

or' otheinon-metallicmaterials usually having to provide abetter frictional engagement with alfsubstantial degree of resiliency. These cots 10 the cots at. The shaftneed not extendzthrough. rid on th'e -lowerfiuted rollwith which the top the bosses but, as better shown in Fig.2, maybe-j rdllttgoopeiates where they-pressthe strands of forced :into them for-only about three-quarters rdving-or sliver -against thebottom roll a the of the length of each boss. i 1

are mg: operation proceeds, and the weight re- According to the present invention the quiredior. this purposeis-applied through a saddIWhich-bearsOn-the neckof the roll. In order the other parts and are connected to the body,

t,o-"hold the iroll against travel eithcr backward of the roll simply by apressed fit. Consequently, or :forward, the gudgeons are positioned in slots they can be removed and replaced whenever they formed in cap bars-located at opposite sides of become worn sufficiently to warrant their ireeach set of top rolls. The foregoing is an arnewal. Aiso, the neck portion of the shaft be; rangement used almost universally in spinning tween the two bosses is encircled by a sleeve ,5 and roving frames. i

Ch bf th j ctionable features of rolls of pressed or a loose fit with the shaft. In either which may be of metal and may have either a;-

character the fact that. the bear 0 event, when it becomes worn the shaft 2 can" be friction surfacs ofthe roll body; namely the withdrawn from one of the bosses,- thus per? gudgeons and the necks, soon become worn to mitting the sleevetobe removed-and,replaced by Such a ree that the entire roll must be disa new one. The remaining part of the body then carded. While this has ay been regarded as can be reassembled with those just mentioned. a necessary incident to manufacturing procedure, In t manner a worn t 11 body can be it is a serious factor in View Of the expense of 3U stored to useable form at a relatively slight exproduction of these bodies. pensa Another troublesome feature of such construc- A further feature of t i invention id tions is the further fact that frequent cleaning i making the gudgeons fi--6 and the sleeve 5, is necessary to remove the 111117 and fly which if desired, of some material having a coeflicient collects on the rol necks and gudgeons and in of friction so low that the application of external the slots of the cap ba s. U u also. the neck lubrication to it will not be required. This maportions, and Often e gudgeohs as Well, must terial may be one having such characteristics be lubr c te although Care should be when to that it requires no lubricant. Such materials, as use the lubricant sparingly, both beca it certain of the synthetic plastics, including nylon, makes cleaning more difficult and also for the Teflon the po1yvinylseries f resins, ethyl 11 reason that y spot film of Oil On the cots lose, cellulose acetate, and others, satisfy these or on the fibrous material b g drafted is highly requirements. Or the parts just mentioned may obj ct be made of one of the self-lubricating materials,

T e present invention aims to devise a top such as the oil impregnated sintered metals, or roll construction in which these objectionable even 011 impregnated hard Woods, if the presfeatures Will be eliminated. sures are not too great,

The nature of the invention will be readily For these purpgses one of the synthetic wunderstood from the fol ow description When amide compositions, such as that sold by the Du read in connection with the accompanying drawm; cgmpany under th commercial name of ings, and the novel features will be particularly nylon is highly Satisfactory, i is a long pointed out in the appended claimchain synthetic polymeric amide having recur- In t e d a ring amide groups as an integral part of the main Fig. 1 is a o t vat of a roll Constructed polymer chain. The formula is understood to be in accordance with this invention; and --NH(CH2 )--NH CO(CH CO where the Fig. 2 is a vertical, sectional view of the roll sub. N and M may be 6 to 12 and equal or not. It

' This is defined chemically as a polytetrafluorethrylene polymer and is also obtainable from theDu- Pont Company. This material is the equivalent of nylon for the purposes of this invention.

The other synthetic thermoplastics above mentioned can also be substituted for the nylon and Teflon just described, and used without the addition of lubricants. This is also true of the selflubricating materials above referred to, one example of which is obtainable commercially under the name of Oilite. All of these materials have the important operating advantage afforded by their extremely low coefficient of friction.

It has been common to run cast-iron rolls of the character above described with cast-iron saddles and in cast-iron bearings, or cap-bars. Once a glaze is established on the friction surfaces the parts operate quite satisfactorily. The

coenicient of cast-iron running on cast-iron slightly lubricated is given in Machinerys Handbook as .15. All of the materials above mentioned which applicant proposes to use in the construction of his roll body have a very much lower coefficient of friction which translates itself into a saving in power and a consequent reduction in overhead costs. Moreover, because no lubricant is required, both the labor and expense for applying it and the work involved in cleaning is reduced very materially. While some of the materials mentioned are not suited to high speedoperation, others -do not have this limitation.

The invention thus provides a top roll of the solid type which is far superior to those in com mon use, not only because it requires no lubrication,.but also due to the fact that less power is required to drive it and the expenses of opera tion and renewal are reduced.

Having thus described my invention, What I desire to claim as new is:

A top roll for the textile drawing mechanisms of spinning and roving frames, comprising a shaft, two bosses supported on said' shaft and adapted for the application thereto of the customary cots, said bosses having a pressed fit upon said shaft .and being spaced apart, and gudgeons pressed into the outer ends of said bosses beyond the ends of the shaft.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 54,732 Hussey May 15, 1866 215,464 Kelly May 20, 1879 347,910 Young et a1 Aug. 24, 1886 475,929 .Carroll May 31, 1892 628,521 Campbell July 11, 1899 628,522 Campbell July 11, 1899, 1,246,841 Bache Nov. 20, 1917 1,286,936 Campbell Dec. 10, 191.8 1,678,039 Garey July 24, 1928 2,170,545 Burton Aug. 22,1939 2,200,129 Whiteford May 7,1940 2,246,086 Austin June 17, 1941 2,246,092 Gilman June '17, 1941 2,247,995 Gilbert July 1, 1941 2,256,193 Cobb Sept. 16, 1941 2,263,780 Kettley Nov. 25,1941 2,275,538 Marvin et a1 Mar. 10, 1942 2,355,510 C'obb Aug. 8, 1944 2,367,088 Benson p Jan. 9, 1945 2,459,598 Stott ,Jan. 18, 1949 2,582,516 Williams Jan. 15, 1952 FOREIGN PATENTS Number Country 7 Date 1,427 Great Britain of 1893 214,291 Great Britain Apr. 14, v1924 518,465 Great Britain Feb. 28, 1940 374,325 Italy Aug. 23, 1939 

